With both hands on the handlebars and your feet on the pedals, the motor engages.

The Thunder series is primarily designed for riding in cities. Off-road or extreme sports riding is not recommended.

The E-bike has a built-in battery and does not support removing the battery for separate charging.

The e-bike does not support this feature. After reaching the set speed limit, the motor will stop working, but you can continue riding by using human power.

Yes, it does. Because lithium batteries are used as the core components, the performance of the batteries will be affected to some extent in low-temperature environments. This is mainly reflected in reduced battery life.

When the red light on the charger is on, it indicates that it is charging. When the red light on the charger turns green, it means the battery is fully charged.

The E-bike currently does not support energy recovery.

Press the power button twice quickly to toggle the headlight on and off.

The charger will produce heat during charging, and it's normal for it to feel hot to the touch at its highest temperature. Once charging is complete, unplug it from the power source and let it cool down naturally.

Keep the charger away from open flames and water. Unplug it promptly after the battery is fully charged, and please do not charge it for more than 24 hours.

If there is no activity (no speed or button presses) for more than 5 minutes when the E-bike is turned on, it will shut down and cut off power automatically.

If the E-bike is not being used for a long time, it's recommended to fully charge the battery every 30 days.

The battery cannot be removed. Unauthorized removal will void the warranty. The internal circuits have high voltage, and removing the battery exposes these circuits, posing a risk of electric shock. Do not attempt to remove the battery on your own.

Battery range can be affected by various factors such as temperature, load, speed, and whether the bike is being ridden at a constant speed. The advertised range assumes a fully charged battery, a 75 kg load, a 77℉ ambient temperature, and 60% of the maximum speed on a flat, hard surface.

Brake pads are components that clamp onto the brake disc to slow down the bike. If you notice a decrease in brake performance during riding, it's recommended to replace the brake pads.

The Thunder 2 has a net weight of 22kg (48lbs) and a maximum load capacity of 100kg (220lbs).

The charging port is located under the handlebars on the left side of the frame.

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The battery uses 40 18650 cells with a rated voltage of 36V and a rated capacity of 10.4Ah.

It takes 4 to 5 hours to fully charge the battery using the standard charger with an input voltage of 110V-240V/2A AC.

The recommended tire pressure is 30 PSI. It is suggested to lower the pressure slightly on wet roads.

The tires are 20" x 2.125" pneumatic rubber tires.

The US version is Class 2 with a top speed of 20 mph for both throttle and pedal assist mode. The EU version has pedal assist only and a top speed of 25 km/h to comply with EU regulations.

The US version has a range of 37 km in throttle mode. The EU version and US version in pedal assist mode have a range of 50 km.

The US version uses a motor with a rated power of 350W. The EU version uses a motor with a rated power of 250W.

The unfolded dimensions are 1515*580*1085mm. The folded dimensions are 850*430*730mm.

It uses Shimano shifter, derailleur and cassette.

The front fork uses high-carbon steel. The rear fork uses spring damping.

The frame is made of aluminum alloy.

The brake discs are 160mm, specifically the JAK-8V model.

It is recommended to adjust the shifter during riding. The handle on the dial is used to shift down. The blue button at the thumb position is used to shift up.

You can adjust the position of the rear derailleur by turning the hexagonal screw on it. Looking from the top down, ensure the position of the flywheel at the bottom of the rear derailleur is in line with the current gear on the cassette.

The Thunder 1FT has a net weight of 29.5kg (65lbs) and a maximum load capacity of 100kg (220lbs).

The Thunder 1FT has four riding modes: 0, 1, 2 and 3. You can shift up or down between the modes by pressing the power button and M button. In mode 0, the bike will have no pedal assist. In modes 1, 2 and 3, the bike can reach the maximum speed, but the level of pedal assist will be different.

The charging port is located under the handlebars on the left side of the frame.

The battery uses 52 18650 cells with a rated voltage of 48V and a rated capacity of 10.4Ah.

It takes 4 to 5 hours to fully charge the battery using the standard charger with an input voltage of 110V-240V/2A AC.

The recommended tire pressure is 30 PSI. It is suggested to lower the pressure slightly on wet roads.

The tires are 20"x4.0" pneumatic rubber tires.

The US version is Class 2 with a top speed of 20 mph for both throttle and pedal assist mode. The EU version has pedal assist only and a top speed of 25 km/h to comply with EU regulations.

The US version has a range of 36 km in throttle mode. The EU version and US version in pedal assist mode have a range of 70 km.

The US version uses a motor with a rated power of 500W. The EU version uses a motor with a rated power of 250W.

The US version uses a motor with a rated power of 500W. The EU version uses a motor with a rated power of 250W.

It uses Shimano shifter, derailleur and cassette.

The front fork uses hydraulic damping, and the rear fork uses a 1200 lb spring damping system.

It is recommended to adjust the shifter during riding. The handle on the dial is used to shift down. The blue button at the thumb position is used to shift up.

You can adjust the position of the rear derailleur by turning the hexagonal screw on it. Looking from the top down, ensure the position of the flywheel at the bottom of the rear derailleur is in line with the current gear on the cassette.